Scraper for block-machines.



I; GROGG. SGRAPBR Fon BLOGK MACHINES.

APPLfOATION PILEDJUNE 6, 1910.

986,459. vPatented Mapu, 1911.

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ISAAC GROGG, OF AUBURN, INDIANA, ASSIGNOR TO IDEAL CONCRETE MACHINERY COMPANY, 0F SOUTH BEND, INDIANA, A CORPORATION OF INDIANA.

SCRAPER FOR BLOCK-MACHINES.

Specication of Letters Patent.

Patented Mar. 11, 1911.

Application led Tune 6, 1910. Serial No. 565,310.

To all whom it may concern:

lle it known that l, ISAAC GROGG, a citizen of the United States, and a resident of Auburn, in the county of Dekalb and State of Indiana, have invented a new and 1m* proved Scraper for Block-Machines, of which the following is a specification.

This invention relates to a device for scraping off the surplus material from the tops of concrete block-molds, of the type shown by the Borst and Grroscop Reissue Patent No. 12,573, dated Dec. 13, 1906, and the object of t-his construction is to provide a device which shall be strong, efficient, and readily attachable to machines of this class.

In the accompanying drawings, Figure 1 is a side elevation of a faceedown block machine with this scraper mounted on the same. Fig. 2 is a plan of the same with the smoothing-plate partly broken away.

Fig. 3 is a cross section of the scraper on the line 3 3 of Fig. 2. Fig. 1 is an eleva tion of the front plate of the scraper. Fig. 5 is a detail of the scraper actuating means.

Similar reference characters refer to like parts throughout the several views.

The legs 1, base 2, arms 3, cross bar 1, bracket 6, bottom plate 7, end plates 11, cores 17, core-stems 25, hand-lever 31, shaft 30, actuating lever 32, and links 33 of the machine in the drawing are similar in construction and operation to those described in said patent to Borst and Groscop.

Secured to the arms 3 are brackets 10, which carry the guide-rods 11.

The scraper frame comprises the front cross-bar 12, intermediate cross-bar 13, rear cross-bai' 11, side-bars 15 and 16, and downwardly extending lugs 17 which are perfoi-ated to receive the guide-rods 11. Projecting rearwardly from the cross-bar 13 are small lugs 18 between which is pivoted the link 19, which is also pivoted to the upper end of the actuating lever 50. Two collars 51 and 52 are loose on the shaft 30, and are connected by the yoke 53. To the collar 51 is secured the scraper-lever 51 and to the collar 52 is secured the actuating-lever 50. Movement of the scraper-lever will therefore cause a corresponding movement rof the scraper. To the front cross bar 12 may be secured the scraper-plate 56 which may be formed with shallow notches 57. See Fig. 1. The side-bars 15 are preferably T shaped in cross-section, and the inwardly mold, the plate 56 scraping off all superflul ous block material. If the plate have the notches 57, ridges of material will be left above the spaces between and outside the cores 17. When the frame is thus brought forward, the plates 60 will be above the freshly molded block. A sharp blow on its Lipper surface, by any heavy tool, will press the plat-e down so that it will flatten out and smooth the top of the block. This can be satisfactorily accomplished when the tamping-machine shown by the Brandell Patent No. 913,966 dated Dec. 21, 1909 is used with the block-machine. The tamping-hammers are permitted to fall onto the plate 60, de-4 pressing the same and finishing the block. The springs 61 are of suflicient stiffness to support the plate 60 but yield at little pressure. After the plate 60 has been forced down and released, the lever 31 may bc swung back, withdrawing the cores 17, and through the contact between the corelever 32 and the scraper-lever 50, the former will force back the latter and with it, move the scraper from above the mold. The mold can Y then be opened and the block removed as depatent.

Many changes in the details of the diierent parts may be made by those skilled in the art of block machines without departing from the spirit of my invention.

Having now explained my construction, what I claim to be my invention and desire to secure by Letters Patent is 1. In a block-machine, the combination of a mold, a frame for supporting the mold, a shaft mounted on said frame, brackets mounted on the frame, guides carried by the brackets, a scraper-frame slidably mounted on the guides, two levers loosely mounted on said shaft, a yoke connecting the same, and

20Y said bolts between the side-bars,and springs 2 5"ets mounted on the frame, scraperguides a link connecting the upper end of one of saidlevers to the scraper-frame.

2. In a blockmachine, the combination of a mold and meanstosupport the same, a 5 frame slidably mounted above the mold, a smoothing-plate, and means'for resiliently connecting the plate to the frame. Y c Y 3. In a block-machine,the combination of a mold and meansl to support the same, a scraper-frame slidable above the mold, a* smoothingplate, bolts 'mounted in said frame vto support the plate, and springs on the bolts to normally hold the plate in its elevated position. Y 4. In a block-machine, the combination of a 'mold and Vmeans tosupport the same, a scraper-frame slidable above vthemold and comprising side-bars and cross-bars, bolts mounted on said frame, aplate supported by engaging the bolts to hold the plate in its elevated position; f

5. Ina block-machine, the combination of a mold, a frame supporting the same, brackcarried bythe brackets, a scraper frame comprising sideand cross-bars,` and lugs engaging the guides, a shaft mounted on said frame, levers mounted on said shaft, and

connections between the levers and between a lever and the scraper-frame Vfor movingV the same.

comprising scraper-plate removably attached to the .6. In a blockmachine, thecombination of a Vmold and means to support the same, a

`scraper-frame slidable abovethe mold, a

smothing-plate, kbolts mounted in saidn frame to support the plate, springs on the bolts to normally hold the plate in its elevated position, and a lever for moving said 'Y frame forward and backward over the mold.

7. .Ina block-machine, the combination of a mold and means to support the same, a scraper-framev slidable above the mold and side-bars and cross-bars, a

front cross-bar, bolts mounted on said frame, a plate supported by said bolts between the side-bars, springs engaging the bolts to hold the plate in its elevated position, and means to move the scraper frame forward and backward over the mold.

8. In a block machine, the combination of a mold, a frame supporting the same, brackets mounted on the frame, scraper guides carried by the brackets, a scraper-frame carried by the guides and comprising sideand cross-bars, a scraper-plate secured to the front cross-barand having shallow notches in its lower edge, and levers to move the scraper forward over the top of the mold.

In testimony whereof I have signed this specification in the presence of two lsubscribing witnesses.

ISAAC. GROGG.

Witnesses MICHAEL BoLAND, W. I. WISE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

